You remember Mystery Science Theater 3000, don’t you? That cult classic with the puppet robots and goofy janitor guy cracking zingers at Gamera flicks and other B-grade afternoon movies? Now those guys do RiffTrax, snarky movie commentaries you can play along with your favorite big-budget blockbuster as well as no-budget flop. And they’re about to invade select San Antonio theaters Wednesday, Aug. 17, with RiffTrax Live: Jack the Giant Killler, a live 7 p.m. broadcast.

The event features MST3K vets Michael J. Nelson (that janitor guy), Kevin Murphy (the gumball machine robot Tom Servo) and Bill Corbett (the, uh, gold robot thingie Crow) — all riffing on 1962′s Jack the Giant Killer. The cheestastic fantasy flick promises a heroic farmboy, an exquisitely bearded villain and badly-rendered beasties that no doubt have Ray Harryhausen already spinning in his grave in applicable stop-motion. (He may also be spinning about a Jack the Giant Killer remake headed our way in 2012.)

Fans can also catch a new short from the RiffTrax boys plus two original animated shorts courtesy Rich “Lowtax” Kyanka of Something Awful. There’s swag, too. Audiences can get free digital goodies after the event, including a downloadable short, avatars and a digital photo of the boys, via a Web address that will be revealed onscreen.